Lock nut and bolt.



R.' T. AINSLIE. LOQK NUT AND BOLT. APPLICATION mum no. 1, 1010.

Patented July 9, 1912.

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Inventor: IZaZerl T14 7A 4 ROBERT an. AINsLIE, or Los ANQ-ELES, CALIFORNIA,

LOCK NUT AND BOLT.

Specification of Letters Patent.

.tf'azeiited Ju y 9, 9

application filed December 7, 1910;. Serial No. 596,125.

(1.-" .t')/ 'eZ /)l(l i/ concern:

I. own that l. Rouenr T. Aixsue. a on was of the United States, residing at Los a t 3 in the county of Los Angeles and California, have invented a new Lock Nut and Bolt, of which the \ing a specification. oh eet of th s invention is to provide means for looking a nut 5 ii can not be withdrawn teutting the parts. her "ijects of the invention will appear Y the ac ompanying drawings illustrate the nvention, and relerring thereto: Figure l as a longitudinalsection o'f-t-he bolt, partly elevation. i i 2 is a vertical section, gvartlvin elevation of the bolt, with the nut iii and locked thereto. Fig. Man of Fig. 2. Fig. dis a the bolt with the nut there- "ZtlOllfll viewat right an the locking pin removed: on line :ca; in Fr n is-pro'vided with head si iv-threaded portion 3', is t o itudinal slot l extending 1 i he outer end of the bolt, inwardly s lent distance to extendwithin the nut.

u the ordinary eper'ative position of the nut. v2 2 slot extends diametrically across the l and bore or cylindrical channel 5 is mined axially in the bolt, said bore extending l rom the outer end of the holt'to about the same depth as the slot 4. The bore 5 divides the slot 4 into two portions which open into said bore 5 and form sharncorners or edges 6 where theslots and bore meet. The not 7 may be of any usual form adapted to work on the screw-threaded portion 3 of the bolt, and is securedor locked to the bolt by means of a key, consisting of a tapered pin 8. T he inner or smaller end of said tapered pin is of a size just sullicient i to enable it to enter the cylindrical bore 5,

and the outer end of said pin is somewhat larger than the bore so as to expand the bolt when the pin is driven into said bore.-

l u using the bolt, the nut i is screwed into place and the pin 8 is then inserted in the bore 5 and driven in thereby expanding the bolt so that it is driven outwardly against the nut and the threads are tightened on one another, the mit being then held from with-- drawal from the bolt" by friction due to tightness of contact and by the fact that the =dly expand as shown 2' and o. This expansion or dare lghe outer end is insured nee of the pin, but by a a or upset portion of the is edges 0 of the bolt where the .ln deforms or upsets said edges (3 it "in; the pin into place, the metal of the b= being in this-operation spreader forced into the slot as in the manner Jieated at 10 in Figs. 2, l, 5- and 6. i essen to this operation that the pin should engage we bore at the end of the pin on entering the here so as to produce'the' deformi action. It will be noted that even hen the tapered pin'is reinoved as shown F1 5, the nut is securely locked by reason. of the fact that the deformation -or in-tnusion of the metal into the slots forms an obstruction preventing the outwardly flaring portions of the bolt fromapproaching one another, thereby maintaining the outward flare of the bolt and preventing the nut from being withdrawn, and the pin may therefore be used merely as an expanding means for the bolt, beingthen withdrawn, leaving the nut lockedto the bolt by'the deformation of the bolt as stated.

Va li-at I claim is:

1. A bolt having a threade cl exterior and.

provided with a transverse slot extending inwardly from its outer end. and having a cylindrical .axia-l bore extending inwardly from its outer end, such slot and bore extending into a nut when a nut -is screwed upon the bolt, a nutscrewed onto said bolt, and a tapered pin driverrinto said bore, the larger diameter of said tapered pinbeing greater than the diameter of said cylindrieal bore, the outer end of the bolt being exsaid pin, and the corners of the bolt, where the slots therein meet the bore. being spread and deformed so as to extend into the slots. 3. A. boltprovided with a transverse slot,

' the bolt; where the slots therein meet the bore, being spread and deformed .50 a5 to exextending'inwardly from its outer end and I V In testimony whereof, I have hereunto set having a cylindrical axial bore extending my hand at L05 'Angeles, Cahforma thls 10 inwardly frem its o'uter end, a nut screwing 29th day of November, 191%. on said boltthe Outer end of the bolt being i T r r; expanded within the nut, andthecorners of I ULIE' In presence of- A. P, KNIGHT,

FRANK L. A. G AHAM.

tend into the slots. 

